高寒地带生态敏感区铁路隧道洞口工程设计优化研究  

Research on Optimization Design of Railway Tunnel Portal Engineering in High Cold Regions of Ecological Sensitive Areas

作　　者：万炳宏 WAN Binghong(China Railway 25th Bureau Group Co.Ltd.,Guangzhou Guangdong 510600,China)

机构地区：[1]中铁二十五局集团有限公司,广东广州510600

出　　处：《铁道建筑技术》2023年第9期125-129,共5页Railway Construction Technology

基　　金：中铁二十五局集团有限公司科技研发计划项目(局科〔2014〕261-33号)。

摘　　要：随着西部大开发的推进,我国在高海拔寒区及生态环境敏感地带修建的隧道会越来越多,隧道洞口段施工的顺利与否直接关系到后续整体工程进展,而目前关于这方面的研究比较少。针对生态敏感区高寒地带铁路隧道工程洞口工程设计和施工难题,依托成兰铁路红桥关隧道,分析原设计方案存在的问题,提出了综合洞口优化、隧底加强、明洞接长、防排水优化四种手段的洞口工程优化方法,同时采取合理的施工工序和质量控制措施,经过现场应用,上述措施显著改善了生态敏感区高寒地带铁路隧道洞口环境,保证了隧道施工及运营安全,可为相关工程提供参考。With the advancement of the Western Development,more and more tunnels will be built in high-altitude cold regions and ecologically sensitive areas in China.The smooth construction of the tunnel entrance section directly affects the overall progress of subsequent projects,and there is currently relatively little research on this aspect.In response to the design and construction difficulties of railway tunnel engineering openings in ecologically sensitive areas and high cold areas,relying on the Hongqiaoguan Tunnel of the Chengdu-Lanzhou Railway,the existing problems in the original design plan were analyzed.A comprehensive optimization method for tunnel openings,tunnel bottom reinforcement,open cut tunnel extension,and waterproofing and drainage optimization was proposed,which included four methods.At the same time,reasonable construction procedures and quality control measures were adopted.After on-site application,the above measures have significantly improved the environment of railway tunnel openings in ecologically sensitive areas and high cold regions,ensuring the safety of tunnel construction and operation,and can provide reference for related projects.

关 键 词：铁路隧道 生态敏感区 高寒地带 洞口设计 明洞 

分 类 号：U453.1[建筑科学—桥梁与隧道工程]